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US5356376A - Flow controllers for fluid infusion sets - Google Patents

Flow controllers for fluid infusion sets Download PDF

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Publication number
US5356376A
US5356376A US07/923,927 US92392792A US5356376A US 5356376 A US5356376 A US 5356376A US 92392792 A US92392792 A US 92392792A US 5356376 A US5356376 A US 5356376A
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US
United States
Prior art keywords
fluid
flow controller
line
controller according
flow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/923,927
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English (en)
Inventor
Zoran Milijasevic
Graham Bode
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MacNaught Pty Ltd
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MacNaught Pty Ltd
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Publication date
Application filed by MacNaught Pty Ltd filed Critical MacNaught Pty Ltd
Priority to US08/272,232 priority Critical patent/US5499968A/en
Assigned to MACNAUGHT PTY LIMITED reassignment MACNAUGHT PTY LIMITED ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BODE, GRAHAM, MILIJASEVIC, ZORAN
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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16877—Adjusting flow; Devices for setting a flow rate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids

Definitions

  • the present invention relates to flow controllers for administration sets for the purpose of delivering fluids into the human body. Infusing fluids into the human body is done for a variety of medical reasons and there have been many administration sets which have been developed for this purpose.
  • the present invention seeks to improve administration sets used for the purpose of infusing fluids into the human body by providing a flow controller which is adapted to be used as an attachment to the administration set or alternatively to be integral with an administration set.
  • the present invention therefore comprises: a fluid flow controller for insertion in a selected position in a fluid flow line of an administration set. More particularly,. the invention resides in a flow controller adapted for detachable or fixed attachment to an administration set, said flow controller essentially comprising; a housing having a chamber inside which a flow restrictor fits and which is adapted to enable attachment to the administration set or to be integral therewith, wherein when fluid flows through said administration set to a patient via said flow controller said flow restrictor thereby restricts the flow of fluid to the extent that the fluid discharged into the body of said patient takes place at a constant rate irrespective of blood viscosity or fluid or body temperature.
  • the present invention seeks to provide a convenient form of providing a controlled flow in an administration set and like infusion apparatuses and to overcome the problem of fluid impedence which changes significantly with change of temperature especially over the conventional range of temperatures in which administration sets of the type to which the present invention is ideally adapted is used.
  • fluid flow rate changes of up to 8% can be caused by this difference alone.
  • the present invention comprises: an in line fluid flow controller for use with a fluid administration set for infusion of fluid into the body of a patient, the administration set comprising essentially a reservoir of fluid connected to a supply line having a fluid discharge orifice; characterised in that the fluid flow controller comprises; a housing having a chamber therein, an inlet to and outlet from said chamber, said housing being adapted to receive therewithin at least one restrictor having an orifice or orifices configured to control the rate of fluid flow therethrough and into the body of a patient such that the fluid is infused into a patient at a predetermined constant flow rate or at a flow rate within predetermined limits via said discharge orifice.
  • the present invention comprises: a fluid flow controller for inclusion in a fluid flow line of an administration set for infusing fluids into the body of a patient, said fluid flow controller comprising a housing adapted to accommodate therein at least one restrictor, said housing comprising an inlet and an outlet which are associated with a priming chamber.
  • the flow controller comprises a resiliently deformable housing which facilitates evacuation of the supply line or transmission of a fluid there along to prime the supply line either upstream or downstream of said at least one restrictor.
  • the fluid flow controller is adapted for detachable attachment to the fluid supply line of an administration set or alternatively, fabricated integral with the fluid supply line of an administration set.
  • FIG. 1 shows a schematic layout of a typical administration set with the fluid flow controller inserted in a pre-selected position in the fluid supply line.
  • FIG. 2 shows an isometric view of one preferred embodiment of the flow controller adapted for detachable attachment to the fluid supply line.
  • FIG. 3 shows an exploded side view of the flow controller shown in FIG. 2.
  • FIG. 4 shows an enlarged cross-sectional view of the flow controller of FIG. 2 showing the restrictor plate spanning the flow chamber.
  • FIG. 5 shows a flow controller according to an alternative embodiment wherein the flow chamber is eccentric to the axial alignment of the inlet and outlet to the flow controller.
  • FIGS. 6a, 6b and 6c show views of another embodiment of a flow controller adapted for insertion in a fluid supply line of an administration set as shown in FIG. 1.
  • FIG. 7 shows an elevational view of a longitudinal cross-section of a flow controller with a filter according to a preferred embodiment of the present invention.
  • FIG. 8 shows a long sectional view of a multiple flow controller with multiple restrictor plates each with one orifice.
  • FIG. 9 shows a plan view of a rotatable member of a flow controller according to a preferred embodiment with passages adapted to align with the holes in the circular restrictor plate of FIG. 10.
  • FIG. 10 shows a cross section through the member of FIG. 9.
  • FIG. 11 shows a long sectional view of a multiple flow controller according to one embodiment of the invention having a single plate with multiple orifices.
  • FIG. 12 shows a plan view of a circular restrictor plate with radially disposed holes.
  • FIG. 13 shows a plan view of drainage passages overlaid by the restrictor plate of FIG. 12.
  • FIG. 14 shows an elevational view of an adjustable multi-flow controller according to one embodiment.
  • FIG. 15 shows an elevational view of an adjustable multi flow controller according to an alternative embodiment.
  • an administration set 1 comprising a fluid supply line 2 which runs between a fluid reservoir end 3 and a fluid discharge end 4.
  • a flow controller 5 which may be inserted in the fluid supply line as an attachment to the administration set 1 or alternatively, as an item integral with the supply line 2.
  • the fluid supply line 2 is adapted with a valve 6, a plastics slide clamp 7, a flash ball 8, a luer connector 9 and a tip protector 10 to form one possible configuration of administration set.
  • an administration set may simply have a reservoir, a fluid flow line and a flow controller upstream of an outlet.
  • FIG. 2 shows the flow controller according to one preferred embodiment of the invention.
  • the flow controller in FIG. 2 comprises a housing 11, which is adapted to house a restrictor 12 (see FIG. 3), an inlet 13 and an outlet 14.
  • the housing 11 is comprised of a resiliently deformable but elastic material which enables the priming of the fluid flow line or urging of fluid along said flow line or releasing air from the flow line.
  • FIG. 3 shows the flow controller of FIG. 2 from various views including a cross sectional exploded view.
  • the housing 11 is comprised of symmetrical components 16 and 17. These are separable and provide a means for enabling insertion of the restrictor 12 therein.
  • a chamber 15 is formed and this becomes the priming chamber in this embodiment.
  • the inlet and outlet 13 and 14 are in alignment with each other and also in axial alignment with the priming chamber 15.
  • the restrictor in this embodiment is shown as a single plate with a single orifice.
  • FIG. 4 shows an assembled view of the flow controller with the components 16 and 17 of the housing 11 brought into apposition. In doing this they secure the restrictor or orifice plate 12 such that a barrier is presented substantially normally to the axis of the fluid flow line which is in turn axially aligned to ends 13 and 14 of the housing 11.
  • the orifice is adapted with a geometrically designed hole 18 which can be seen in FIG. 4 and this has been made the subject of applicants' co-pending U.S. application no. 480,290, filed Apr. 16, 1990, which has been abandoned in favor of co-pending continuation-in-part application no. 875,765, filed Apr. 29, 1992.
  • the housing 11 receives fluid via inlet 13 axially along the passage 19 and into the chamber 15.
  • the geometry of the hole 18 enables the fluid to be delivered at a constant flow along passage 20 and via outlet 14 into the body of a patient.
  • the housing 11 can either be detachably affixed to the fluid supply line or moulded integral with the fluid supply line such that the inlet 13 is to be regarded as of indefinite length; so to the outlet 14. It should be noted that the shape and configuration of the housing as illustrated in FIGS. 2 to 4 shows merely one embodiment of many different embodiments of a detachable or fixedly attached fluid flow controller for use with an administration set in a fluid supply line.
  • FIG. 5 there is shown a further embodiment of a flow controller 21.
  • This particular embodiment of flow controller also adapted for detachable or fixed attachment to an administration set supply line comprises a housing 22 comprising an inlet 23 an outlet 24 and a priming chamber 25.
  • the housing also comprises means to enable the adaption of a restrictor plate 26 and also the insertion of a hydrophilic filter 27 therein for the purpose of filtering the fluids which flow therethrough.
  • the priming chamber is eccentric or substantially normal to the axial alignment of the inlet 23 and outlet 24.
  • FIG. 6a shows from one view a further embodiment of a flow controller 28 having an axially aligned inlet and outlet 29 and 30 respectively, in addition to a priming chamber 31 to form a flow controller housing 32.
  • the housing is adapted to receive a restrictor plate 33 for insertion in such a way that it is used in conjunction with a top seal 34 and a side seal 35.
  • the housing is also adapted with a hydrophilic filter 36 at the inlet 29 for the purpose of filtering the fluid which flows therethrough prior to passing through the restrictor 33.
  • FIG. 6c shows an alternative configuration of the housing shown in FIG. 6b, this time with a reduced priming chamber 37 and a reconfiguration of the sealing and restriction in the upper portion 38 of the housing 39 which is formed by components 37 and 38.
  • FIG. 7 shows an alternative embodiment of the flow controller 40 showing an inlet passage 41 entering a housing 42 also connected to an exit passage 43.
  • the housing 42 has therein a chamber 44, having located therein a hydrophilic filter 45, a hydrophobic filter 46 and an orifice plate 47.
  • the hydrophobic filter comprises a hydrophobic mesh material which allows air to escape to the atmosphere but prevents the fluid from exiting.
  • the orifice plate stays relatively still and the sealing spigot moves away from the plate when the controller is squeezed. This occurs with the assistance of webs.
  • the critical features of the present invention reside in the existence of a housing having an inlet and an outlet with a chamber therein being adapted to accommodate at least one restrictor for the purpose of delivering via the outlet a constant flow rate of infusing fluid.
  • the connection can be done in any one of the number of different ways including conventional means for fitting tubing together. This would include sleeve fitting, flange mating, slot fitting, clamp fitting.
  • the administration set may be adapted so as to deliver a predetermined liquid flow rate via a series of flow controllers linked either in series or in parallel. It is also to be understood that the present invention is not to be restricted to the delivery of fluids for administration into the human body but can also be used for delivery of fluids in a variety of different applications where fluid is to be delivered at a constant flow rate independent of temperature.
  • each flow control chamber would be adapted with a hydrophyllic filter in order to ensure the purity of the liquid being delivered into the body of the patient when it is used in a medical application.
  • the invention comprises an administration set with the flow controller adapted integrally therewith.
  • the fluid supply line is also adapted with a valve which enables by-pass of fluid or release of air from the fluid supply line for the purpose of priming prior to use.
  • FIG. 8 shows a long sectional view of a multi-flow controller 48 according to an alternative embodiment of the invention.
  • the control as shown in FIG. 8 is adapted with a series of passages 49, 50, 51, 52 and 53.
  • the passages are linked with a series of orifice plates 54, 55, 56, 57 and 58 respectively.
  • the orifice plates are held in position by means of wedge 59 which is adapted with a series of passages 60, 61, 62, 63 and 64 which are aligned with holes in the orifice plates and with the corresponding passages 49, 50, 51, 52 and 53.
  • fluid passes through the orifices in the array of restrictor plates 54, 55, 56, 57 and 58 upon selection of a flow rate by rotatable member 65.
  • FIG. 9 shows a side elevational view of the rotatable member 65.
  • This member is adapted to rotate in a clockwise or anti-clockwise direction according to a selected fluid flow requirement.
  • the rotatable member 65 is adapted with a passage 66 and grooves 67 and 68.
  • the rotatable member 65 is rotated according to one selection such that the passage 66, as shown in FIG. 10 presents to passage 49 where a single flow is required.
  • the passage 66 is presented to one of passages 50, 51, 52 or 53.
  • passage 66 When any one of these passages are selected, fluid then flows through passage 66, and depending upon the presentation of the grooves 67 and 68 relative to the passages 49 to 53, fluid will flow in addition to flow through passage 66 through grooves 67 and 68.
  • fluid will flow in addition to flow through passage 66 through grooves 67 and 68.
  • FIG. 11 shows a similar configuration of an exploded multiple flow controller this time however a single orifice plate 69 is used with a series of apertures of the same or different diameters. These apertures 70, 71, 72 and 73 are presented to passages 74, 75, 76, 77 and 78. Wedge 79 is used to locate the plate in position and also to provide upstream passages for fluid to present to the apertures according to selection requirements.
  • rotatable member 80 operates by rotation in either an anti clockwise or clockwise direction to select fluid flow. As with the controller of FIG.
  • a single flow or multiple flows can be chosen according to the manner in which the passage (not shown) in rotatable member 80 which corresponds to the passage 66 of rotatable member 65 presents to either one of passages 74, 75, 76, 77 and 78.
  • FIG. 12 shows an alternative embodiment of a restrictor plate 81 having radially disposed holes 82, which are located on that plate according to flow requirements.
  • the restrictor plate 81 is superimposed over the rotatable drainage facilitator 83 shown in FIG. 13 such that when a flow selection is made, one or more of the holes 82 present to drainage passage array 84 in the rotatable member 83.
  • FIG. 14 shows an elevational view of the external design of a multi-flow controller showing an external flow selector handle 85 with selection gradations 86.
  • FIG. 15 shows an alternative embodiment of the flow controller 87 having a rotatable flow selector 88.
  • the flow controller 87 has an inlet 89 and an outlet (not shown) which engages with a supply line in a typical administration set.
  • the hole sizes of the restrictor plates may fall within the range of 5 microns to 100 microns.
  • the hole sizes of the restrictor plates fall within the range 50 microns to 100 microns.
  • the present invention can be utilised with gravity feed, administration sets or administration Sets which deliver fluid under pressure by for example elastomeric pressure pumps.
  • the flow controllers can be inserted virtually anywhere in the length of the supply tubes associated with the administration set. It is optional whether a filter is used and where in the administration set the filter would be located. Preferably the filter is located in the flow controller however, it is quite feasible to locate the filter above the flow controller. Where fluid under pressure is utilised in an administration set, ideally the pressure would operate at approximately 10 psi but could be anywhere from 1 psi to 20 psi. As indicated, the use of filters is optional however, when a filter is used in a pressurised system, the reducing effect that the filter has on the pressure must be considered in pressure selection.
  • flow restriction had previously been achieved according to one embodiment by use of a small bore glass tube. It is considered that the present invention can be used as a substitute for and improvement on this method.
  • the flow controller of the present invention in all of its embodiments is useful in any application where a restriction of flow is required in an infusion system, either operated by gravity or under pressure generated by elastomeric or other conventional means.

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Biomedical Technology (AREA)
  • General Engineering & Computer Science (AREA)
  • Vascular Medicine (AREA)
  • Anesthesiology (AREA)
  • Mechanical Engineering (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
US07/923,927 1990-03-08 1991-03-08 Flow controllers for fluid infusion sets Expired - Fee Related US5356376A (en)

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US08/272,232 US5499968A (en) 1990-03-08 1994-07-08 Flow controllers for fluid infusion sets

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AUPJ900890 1990-03-08
AUPJ9008 1990-03-08
PCT/AU1991/000083 WO1991013641A1 (en) 1990-03-08 1991-03-08 Flow controllers for fluid infusion sets

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EP (1) EP0518972B1 (es)
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Also Published As

Publication number Publication date
EP0518972B1 (en) 1997-01-22
CA2077751A1 (en) 1991-09-09
JPH05506163A (ja) 1993-09-16
DE69124368T2 (de) 1997-05-28
ATE148000T1 (de) 1997-02-15
DE69124368D1 (de) 1997-03-06
EP0518972A1 (en) 1992-12-23
ES2098349T3 (es) 1997-05-01
WO1991013641A1 (en) 1991-09-19
US5499968A (en) 1996-03-19
EP0518972A4 (en) 1992-11-05

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